* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.container {
    width: 100vw;
    height: 100vh;
    position: relative;
}

.map-area {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.map-container {
    position: absolute;
    transform-origin: 0 0;
    touch-action: manipulation;
}

.back-btn {
    position: fixed;
    top: 1rem;
    left: 1rem;
    padding: 0.5rem 1rem;
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid #ddd;
    border-radius: 4px;
    z-index: 100;
    cursor: pointer;
}